Is it true a woman's metabolic rate decreases at age 25? What can I do.

From Michigan :

Is it true a woman's metabolic rate decreases at age 25? What can I do
to boost a slowing metabolism?

Besides genetics, muscle mass is the key driver of metabolism, as muscle
is active tissue. After age 25 or so, both men and women tend to lose about
1/2 pound of muscle per year (because of both the clock and inactivity), and
metabolism slows accordingly. To counteract this, you need to do a weight
training program designed to maintain or build muscle mass. This involves
exercises for the large muscles with a weight that causes fatigue after 8-12
reps. Most women will not end up looking bulky, because the muscle will
just replace some of the extra fat (and women don't have the hormones for
bulky muscles anyway.)